RecompileOptChoice (Jikes RVM API)

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org.jikesrvm.adaptive.controller
Class RecompileOptChoice

java.lang.Object
  org.jikesrvm.adaptive.controller.RecompilationChoice
      org.jikesrvm.adaptive.controller.RecompileOptChoice

class RecompileOptChoice
extends RecompilationChoice
extends RecompilationChoice

Represents the recompilation choice of simply recompiling the method in question at a particular opt-level. The cost is the expected compilation time at that level, and the benefit is the execution improvement of executing at that level.

Field Summary
`private int`	`thisChoiceCompiler` The "compiler" (see CompilerDNA) that is associated with this choice
`private int`	`thisChoiceOptLevel` The opt level associated with this recompilation choice

Constructor Summary
`RecompileOptChoice(int level)` Constructor

Method Summary
`(package private) int`	`getCompiler()` Which "compiler" (@see CompilerDNA) is associated with this choice?
`(package private) double`	`getCost(NormalMethod meth)` What is the cost of executing this plan?
`(package private) double`	`getFutureExecutionTime(int prevCompiler, double futureTimeForMethod)` What is the benefit of executing this plan, given the estimated future time for the method if nothing changes?
`(package private) int`	`getOptLevel()` Which opt-level is associated with this choice?
`(package private) ControllerPlan`	`makeControllerPlan(CompiledMethod cmpMethod, int prevCompiler, double prevTimeForMethod, double bestActionTime, double expectedCompilationTime)` Return a controller plan that will start this recompilation choice in action.
`String`	`toString()` How should this choice be displayed?

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

thisChoiceOptLevel

private int thisChoiceOptLevel

The opt level associated with this recompilation choice

thisChoiceCompiler

private int thisChoiceCompiler

The "compiler" (see CompilerDNA) that is associated with this choice

Constructor Detail

RecompileOptChoice

RecompileOptChoice(int level)

Constructor

Method Detail

getCost

double getCost(NormalMethod meth)

What is the cost of executing this plan?

Specified by:: getCost in class RecompilationChoice

Parameters:: meth - The method being considered for recompilation.
Returns:: The expected cost of exeuting this recompilation choice

getFutureExecutionTime

double getFutureExecutionTime(int prevCompiler,
                              double futureTimeForMethod)

What is the benefit of executing this plan, given the estimated future time for the method if nothing changes?

Specified by:: getFutureExecutionTime in class RecompilationChoice

Parameters:: prevCompiler - The previous compiler; futureTimeForMethod - The expected future execution time of the method if left running with the previous compiler.
Returns:: The expected future execution time if this choice were selected

makeControllerPlan

ControllerPlan makeControllerPlan(CompiledMethod cmpMethod,
                                  int prevCompiler,
                                  double prevTimeForMethod,
                                  double bestActionTime,
                                  double expectedCompilationTime)

Return a controller plan that will start this recompilation choice in action. In this case, simply create a plan to recompile at level "optLevel"

Specified by:: makeControllerPlan in class RecompilationChoice

Parameters:: cmpMethod - The method in question; prevCompiler - The previous compiler; prevTimeForMethod - The estimated future time had nothing been done; bestActionTime - The estimated total time implementing this choice; expectedCompilationTime - The expected time for recompiling
Returns:: The controller plan implementing this recompilation choice

toString

public String toString()

How should this choice be displayed?

Overrides:: toString in class Object

getOptLevel

int getOptLevel()

Which opt-level is associated with this choice?

getCompiler

int getCompiler()

Which "compiler" (@see CompilerDNA) is associated with this choice?